Hot roll polishing mechanism



D. B. GEESEMAN 1,954,289 HOT ROLL POLISHING MECHANISM :filed July 17, 195o 6 sheets-sheet 1 April 10,4 1934.

HOT ROLL POLISHING MECHANISM Filed July 17, 1950 6 Sheets-Sheet 2 i CQ CAQ,

April 10, 1934. D. B. GEEsl-:MAN 1,954,289

HOT ROLL POLISHING MECHANISM Filed July 17, 1930 6 Sheets-Sheet 5 April 1o, 1934.

- D. B. GEESEMAN 1,954,289

HOT ROLL POLISHING MEGHANISM Filed July 17, 1930 6 Sheets-Sheet 4 gwuentoz 6 Sheets-Sheet 5 D. B. GEESEMAN Filed July 17, 1930 HOT ROLL POLISHING MECHANISM April 10, 1934.

April 1o, 1934.

D. B. GEESEMAN HOT ROLL POLISHING MECHANISM Filed July 17, 1930 6 Sheets-Sheet 6 Patented Apr. 10, 1934 UNITED STATES HOT ROLL POLISHING MECHANISM Delbert B. Geeseman, Canonsburg, Pa., assigner to Continental Can Company, Inc., New York, N. Y., a corporation of New York Application July 17, 1930, Serial No. 468,712

Claims. (Cl. 80-1) The invention relates to new and useful improvements in a device for polishing the rolls of a mill for rolling heated plates. It is well known that in the operation of a mill of this character 5 it is necessary to polish the rolls in order to keep them free from roughness, or otherwise imperfect plates are rolled known as rough roll wasters. When the rolls are polished by hand the operation of the mill on the plates must be suspended during the polishing period, which requires several minutes, and the polishing has to be repeated every hour or so. Various attempts have been made to provide a polishing mechanism which may be operated to polish the rolls While the plate is being operated upon. The devices which have been devised for this purpose have been impracticable as they have either interfered with the handling of the plate or have not been of a durable character, so that they-could be continuously used during the entire turn of the mill.

An object of the invention is to provide a polishing mechanism wherein the polishing devices may be placed at the discharge side of the mill and substantially within a line tangent to the rolls,

so as not to interfere with the raising o f the' end of the plate for return over the top of .the rolls.

A further object of the invention is to provide a polishing device of the above character, wherein the mechanism for moving the polishing devices back and forth and for holding the polishing devices in contact with the rolls is disposed outside of the housings of lthe mill, so that the parts of the polishing mechanism between `the housings is reduced to a minimum. A still further object of the invention is to provide a polishing mechanism of the above type, wherein the polishing devices are supported by rods mounted for oscillation and endwise movement `in bearings attached to the housing of the mill.

Another object of the invention is to provide' moved endwise in the bearings on the housings,

Figure 2 is an end view of the polishing mechanism and showing more or less diagrammatically a portion of the housings and the rolls of the mill.

, Figure 3 is a sectional view on the line 3'-3 of Figure 1.

Figure 4 is a sectional view on the line 4-4- of v Figure 1.

Figure 5 is a vertical sectional view through the traversing mechanism, and also showing in side View the operating motor for the traversing mechanism. V

Figure 6 is a side View of the control arms for the polishing devices.

Figure '7 is an enlarged view showing the means at the operating end for oscillating the supporting rods so as to hold the polishing stones in contact with the respective rolls. 1

Figure 8 is a sectional View on the line 8-8 of Figure '7.

Figure 9 is an enlarged end view of the reciprocating cross-head carrying the bracket which moves the rods endwise.

Figure 10 is a front view of the same.

Figure 11'is a plan view of the portion of one of the traversing chains.

mechanism. l

The invention is directed broadly to a polishing mechanism for the rolls of a hot mill. The polishing mechanism includes a polishing stone for each roll, a holder for said stone and a rod on which the holder is rigidly mounted. 'I'his rod extends all the way across the roll and through bearings 95 carried by the housings, projecting from both housings. The only mechanism Iwhatever between vthe housings are the rods, the holders and the stones carried thereby. Yielding means is connected to these rods for oscillating the same to press the stones against the rolls, and a traversing mechanism is provided which includes a cross-head reciprocating back and forth to which these rods are attached, so that said rods are are located on the discharge side of the mill. and

the mill, so thatl they do not in any way interfere with the passage of the plates through the mill between the rolls and the lifting of the end of the plate and returning the same over the rolls of the mills for the next rolling operation.

Referring more in detail to the drawings, only a portion of a rolling mill has been shown as the invention in no way relates to the structure of the mll itself. The mill consists of housings 1, 1 in which are mounted for rotation an upper roll 2 and a lower roll 3. Each housing is provided with what is known asa window 4, in which are located the supporting bearings for the rolls. On the inner face of the window at the discharge side of the mill is a bracket 5 which supports a bushing 6 (see Fig. 5). There is a similar bracket and bushing on the other housing, and located in these bushings is a'rod 7 which carries theI polishing stone for the upper roll 2. Also mounted on the inner face of this window is a bracket 8 carrying a bushing 9, and there is a similar bracket and bushing on the other housing. Mounted in these bushings 9 is a rod 10 which carries the polishing stone for the lower roll 3. These rods are mounted for free oscillation in their bearings and also free endwise movement in their bearings. Each rod oscillates about a xed axialline and also moves endwise in said fixed axial line.

Rigidly attached to the rod 7 is a holder 8a` in which is mounted a polishing stone 9a. This polishing stone may be of any desired character for smoothing and polishing the roll. Rigidly mounted on the rod 10 is a holder 11 carrying a polishingstone 12. The rod 7' is yieldingly turned in a" counter-clockwise direction as viewed in Figure 3, and this yieldingly presses the stone against the face of the roll. The rod 10 is yieldingly turned in a clockwise direction and this yieldingly-presses the stone 12 against the roll 3. It will be noted from Figure 2 of the drawings that these .rods and the holders and the stones are all substantially within a line tangent to the two rolls. The rods, holders and stones are also well spaced away from the normal path of travel of the plate as it passes between the rolls. By this arrangement the handle of the plate is not in any way interfered with by these polishing devices. The plate passes freely between the polishing devices and then the end may be lifted in the usual manner and returned over the upper roll without coming in contact with the upper polishing device. As noted above, these polishing devices are on the discharge side of the mill. Any rough scale which is removed from the rolls by the polishing stone, or any particles of stone falling on to the plate, will be dislodged from the plate by the handling of it before the plate is again passed through the rolls. Attempts have been made to place polishy ing devices on the feeding in side of the mill,

in' order to prevent interfering with the return of the plates. By this arrangement the scale and roughness removed from the rolls will drop on to the plate just as it passes between the rolls,

and this will result in rough westers. The only mechanism for supporting and moving these polishing devices, which is located between the housings,are the supporting rods and the holders and the stones themselves.

The` rods extend beyond both housings. On the end of the rod 7, which projects through the housing at the right, is an arm 13 which is firmly clamped to the rod. On the rod 10 is an arm 14 which is likewise firmly clamped to the rod. Extending between the rods is a spacer plate l5 which lies close to these arms. A collar 16 holds this spacer plate from endwise movement on the rods. These arms move endwise with the. rods and are for the purpose of oscillating the rods to cause the stones to engage the rolls. Extending between the arms is a coil spring 17. A rod 18 serves as a retainer for the spring and as a means for limiting the distance to which the arms are separated. When the arm 13 is raised it oscillates the rod 7 so as to move the stone 9a into contact with the roll 2. yAt the same time the arm 14 is moved downward and forces the stone 12 into contact, With the roll 3. By the aid of a nut 19 the stones may be set so that they will bear lightly against the rolls, and as they travel back and forth continuously the rolls will be polished. This light continuous contact of the stones with the rolls brings about the desired polishing of the rolls with little wear on the stones, so that they may be used for long periods of time before they have to be replaced on account of wear.

The rods 7 and 10 pass through the housing 1 at the left of the mill, as viewed in Figure 1, and through a bracket 20 which is bolted to a crosshead 21 by suitable bolts 22, 22. The rods are attached to this bracket 20 so that they may oscillate freely therein, but they are prevented from endwise movement in the bracket. This is accomplished by forming a reduced portion in the rod thus providing shoulders at each side of the crosshead. Mounted on the end of the rod n'I is a clamping collar 21a. This collar has an arm 22a extending horizontally therefrom which is welded to the collar. The collar is clamped to the rod and secured thereto by a set screw so that it is firmly attached to this rod 7. Attached to the rod 10 is a collar 23 which is likewise in the form of a split clamping collar, and is secured to the rod by a clamping bolt and a set screw so as to be very rigidly attached thereto. This collar 23 carries a horizontally projecting arm 24 with a vertically extending lug thereon. Pivotally secured to this lug is a threaded rod 25. This rod extends freely through the arm 22a. A spring 26 is located between the arm 22a and an adjustable nut 27 on this threaded rod 25. This spring tends to move the arms 22a and 24 Vaway from each other, and this will oscillate the rod 7 in a counterfclockwise direction and the rod 10 in a clockwise direction, as viewed in Figure 7. 'This is another means at the operating end of the rods for aiding in moving the stones into yielding contact with the rolls.

Mounted on the housing 1 at the left of the machine, as viewed in Figure 1, is a supporting frame 28 for the traversing mechanism which moves the cross-head back and forth. This frame is provided with a suitable flanged base 29 whichis bolted to the side face of the housing by suitable bolts 30. Fixed to this frame centrally thereof is a cylindrical supporting and guiding rod 31. The cross-head 21 is mounted for free endwise movement on this rod 31. The cross-head as' clearly shown in Figures 9 and 10 consists of a body portion having a projecting sleeve 2lb. In the upper face of this cross-head 21 are dove-tailed recesses 32 which terminate short of the end of the cross-head. In the lower face of the cross-head are similar dove-tailed recesses 33 .which likewise terminate short of theend of the cross-head. The recesses 32 terminate at one end of the cross-head within its limits, whereas the recesses 33 terminate at the and mounted in the respective recesses 33 are lugs 35. These lugs are part of the means for the moving of the cross-head back and forth on this supporting and guiding rod 31. The crosshead just described is shown as used in connection with the mechanism illustrated in Figures 1 to 11, inclusive.

Mounted in the frame 28 is a bearing 36. Extending through this bearing is a shaft 37 which carries at its outer end a sprocket wheel 38, and at its inner end a sprocket wheel 39 (see Fig. 4). Also mounted on this frame 28 is a shiftable plate 40 which has formed integral therewith a bearing 41. In this bearing is mounted a, sha-ft 42 carrying on its outer end a sprocket wheel 43 and on its inner end a sprocket wheel 44; A sprocket chain 45 runs over the sprocket wheels 39 and 44. This sprocket chain is shown in detail in Figure l1. The pivot rods 46, 46 of one pair of connecting links in the chain are extended and provided with collars and links, thus forming laterally projecting members 47 and 48. It is these projecting members that at times engage the lugs 34, 34 at the upper side of the cross-head for moving the cross-head in one direction along the supporting and guiding rod 31. The chain is only shown diagrammaticallyin Figure 4, and the path of movement of these projecting members is also indicated diagrammatically in said figure. In Figure 1 of the drawings the projecting member is shown as engaging the lug and is moving in the direction of the arrow so that the cross-head is being moved toward the left, as viewed in this figure.

At the lower side of the frame 28 there is a bearing 49, -Mounted in this bearing is a shaft 50 carrying at its inner end a sprocket wheel 51. At the outer'lower end of the frame 28 is a shiftable plate 52 carrying a bearing 53 in which is mounted a shaft 54 carrying at its inner end a sprocket wheel 55. Running over the sprocket wheels 51 and 55 is a sprocket chain 56 which is similar in construction to the sprocket chain 45, and which is provided with projecting members similar to the projecting members 47 and 48, one of which is indicated at 57. These projecting members 57 are adapted to engage the lugs 35 for moving the cross-head in the opposite direction. At the outer end of this shaft 53 is a sprocket wheel 58, and running over the sprocket lwheels 43 and 58 isla sprocket chain 59. The

chain 45 passes around the sprocket wheels withwhich itis associated in a clockwise direction. T' ese projecting members 47 and 57 are so disposed on the chains that the lugs 47 will engage the cross-head and move it toward the left, and when the projecting members pass around the sprocket wheel the curved path of travel will cause said projecting members to release the lugs and the cross-head will stop.- Soon after the cross-head comes to a full stop the projecting members 57 will come into contact with the lugs 35 and will take up and move the cross-head to the extreme right hand end of the frame. As these projecting members pass around the sprocket wheel 51 they will release the lugs and the cross-head will stop until it is again taken up by the projecting members on the chain 45 and carried in the opposite direction. The shiftable plates 40 and 52 are for the purpose of maintaining the sprocket chains 45 and 56 under proper tension. Extending along the frame and bolted thereto at its opposite end is a guide bar 60. The cross-head shown in Figure 4 has a flat face which engages this guide bar and thus prevents the cross-head from turning on the supporting and guiding rod 31.

Mounted on a bracket on the housing 1, at a point above the frame 28, is a speed reducing device 61. The shaft of this speed reducing device carries a sprocket wheel 62 and a sprocket chain 63 runs over the sprocket wheel 62, and also runs over the sprocket wheel 38. Mounted on the casing of the speed reducing device is a driving motor M operating a sprocket chain 64. The mo' or, through a sprocket chain 64, operates the speed reducer, and this through the sprocket chain 63 drives the operating sprocket chains 45 and 56.

It is thought that the operation of the device described in detail is obvious. The motor operates these chains continuously during the operation of the mill on the plates, and this causes the cross-head to slowly move'rst in one direction and then in the other, and this in turn causes the polishing blocks to move from one end to the olher of the rolls of the mill. In the mechanism just described there is a slight pause in the travel of the polishing stones as they reverse their movement. This occurs'at 'the time when the polishing stone's are in contact with the bearings on the rolls and this aids in the reducing of the bearings which form on the rolls.

From the above it will be apparent that a polishing mechanism has been provided wherein the only mechanism` between the housings of the mill are portions of the supporting rods, the holders and the stones, and these are so disposed as to be out of the way of the path of travel of the plate through the mill and the path of return of the plate for the next rolling operation. 'Ihe mechanism for operating these polishing stones and for holding the same in contact with the rolls is all outside of the housings, and is very simple and durable so that it may be operated continuously for long periods of time.

In Figures 12 to 14, inclusive, there is shown a 125 modified form of traversing mechanism which may be readily substituted for the traversing mechanism described in connection with the embodiment of the invention illustrated in Figures 1 to 11. In this form of the invention the sup- 130 porting rods, the holders for the stones, and the mounting of the stones and rods are all of a cons'ruction which has been described in detail above, and therefore the traversing mechanism only has been shown. Attached to the right hand housing of the mill 1 is a supporting frame or housing 64a. Said housing is provided with supporting and guiding bars 65, 65 and 66, 66. The cross-head is indicated lat 67. This crosshead has projecting portions extending between the pairs of'guide bars 65, 65 and 66, 66, and thus it is that the cross-head is supported for movement back and forth in this housing or frame 64. The bracket`20 attached to the rods 7 and 10 is bolted to this cross-head 67, and when 145 the cross-head moves back and forth the rods will be moved back and forth thereby. Mounted in the cross-head is a shiftable dog or plate 68. Said cross-head is provided with a recess 69 in which this dog or'v plate 68 is mounted. Balls 150 70, 70 located in recesses in the cross-head are yieldingly forced toward the dog or plate 68 by means of springs 71. The side faces of the dog or plate 68 are provided with recesses 72 and '73. When the dog is moved to the position shown in Figure 14 these balls engage the lower recess and yieldingly hold the dog in this raised position.

When the dog is moved downwardly then the balls will yield until the recesses 72 are opposed to the balls, at which time the balls will engage said recesses and hold the dog in its lower shifted position. There is a lug 73a at the upper end of this dog or plate 68 and a lug 74 at the lower end thereof. These are so disposed that when the plate is raised the lug 73a will project above the cross-head and at this time the lug 74 is housed within the recess in the cross-head. When the dog or plate 68 is shifted to its lower position then the lug 74 projects from the cross-head and the lug 73a will be housed therein.

The cross-head is moved back and forth by a single traversing chain 75. This chain runs over a sprocket 76 on the shaft 77, and also over a sprocket 78 on shaft 79. On the end of the shaft 77 is a sprocket which is driven from the motor above. The sprocket chain as shown inI Figure 14 has spaced projecting members 78, 78. The upper strand a of the sprocket chain passes immediately over the top of the cross-head. A guide plate 79 serves as a backing for the chain and insures that it will travel in a horizontal line. A similar guiding and backing plate 80 holds the lower strand 75h so that it travels in a horizontal line. This lower strand passes along thel lower face of the cross-head. When the dog or plate 68 is raised then the lugs 73a, as there are two of these lugs, will be brought into the path of travel of the projecting members 78 and will be engaged thereby, so that the cross-head is moved to the left, as viewed in Figure 12. Fixed to the upper wall of the frame or housing 76 is an adjustable trip 81 which has depending arms lying in the path of travel of these lugs 73a. The lugs will strike the trips and will be forced downward owing to the fact that the faces of the trips engaged by the lugs are inclined/and also the faces of the lugs 73a which contact with the trips are inclined. This forces the dog down- `ward to its lower shifted position and releases the cross-head from the chain. 'I'he cross-head will then stop in its travel along the supporting and guiding bars therefor. The forcing of the dog or plaie 68 downward moves the lugs 74 into the path of travel of the projecting members 78 on the lower` strand 75h of the chain. Thus it is that these projecting members pick up the crosshead and move it to the right, as viewed in Figure 12. There is the second adjustable trip 82 which makes contact with the lugs 74 and forces the lugs upward so as to release the cross-head from the chain, and this again places the lugs 73a so as to be picked up by the chain.

From the above it will be apparent that the cross-head is moved back and forth by an automatic tripping mechanism sothat only one chain is necessary, and the projecting members may be so spaced as to quickly take up and reverse the direction of movement of the cross-head. The operation of the polishing stones is precisely the same in connection with this traversing mechanism as with that shown and described in connection with Figures 1 to 11. ed to the upper wall of the frame or housing by bolts 81a passing through elongated slots 81h.

` 'I'hus it is that the trip may be adjusted. The

The trip 81 is boltsame is true of the lower trips. It will be noted that the rods are supported in bushings held to the inner faces of the windows in the housings, and it is not necessary to cut away the housings or bore through the housings in order to apply the polishing mechanism to a mill. The rolling mill may be quickly and readily equipped with the polishing mechanism without in any way weakening the housings, and without in any Way interfering with the operation of the mill. By the use of the polishing devices which move continuously and slowly back and forth in engagement with the rolls during the operation of the mill, the rolls are kept clean and 4polished and the rough wasters reduced to a minimum. The polishing stones are uniformly pressed against the rolls and the wear on the stones is reduced to a minimum, so that the stones do not have to be .changed for long intervals of time. Inasmuch as the'operating mechanism for the supporting rods is entirely outside of the housings, it not only is out of the way of the plates but the operation of the mechanism is not interfered with by the plates. The mechanism for operating the polishing devices is verysimple in construction and durable in operation, so that the polishing devices may be operated throughout the entire run of the mill, and the operation of the mill is not interfered with. 'I'hus it is that a maximum rolling output can be accomplished, the quality of the plates increased, and the number of wasters greatly reduced.

. It is obvious that other ways may be provided for traversing the supporting rods, and the details of the mechanism shown and described may be greatly varied without departing from the spirit of the invention as set forth in the appended claims.

HavingI thus described the invention, what is claimed as new and desired to be secured by Letters Patent, is:-

1. A polishing mechanism forl the rolls of a hot mill comprising a rod associated with each roll and extending from one housing to the other and `mounted in bearings carried thereby for oscillation and endwise movement in a fixed axial line,

a holder rigidly attached to each rod, a polishing member mounted in said holder and offset from said rod, means for turning the rods so as to hold the polishing members in yielding engagement with the rolls, and means for reciprocating the rods for moving the polishing members back and forth. f

2. A polishing mechanism for the rolls of a hot mill comprising a rod associated with each roll and extending from one housing to the other and mounted in bearings carried thereby for oscillation and endwise movement in a fixedr axial line,

a holder rigidly attached to each rod, a polishing member mounted in said holder and offset from said rod, mechanism located outside of the hous-l ings and connected to said rods for moving the same endwise for moving the polishing members back and forth across the rolls and mechanism located outside of the housings and connected to said rods for yieldingly holding said polishing devices in engagement with said rolls.

3. A polishing mechanism for the rolls of a hot mill comprising 'a rod associated with each roll and extending from one housing to the other and mounted in bearings carried thereby for oscillation vand endwise movement in a xedaxial line,

a holder rigidly attached to each rod, a polishing member mounted in said holder and offset from said rod, means located outside of the housing at one end of the rods and connected thereto for osoillating the rods so as to hold `the polishing members in yielding engagement with the rolls, and means outside of the housings at the other ends of the rods and connected therewith for reciprocating the rods for moving the polishing members back and forth.

4. A polishing mechanism for the rolls of a hot mill comprising a rod associated with each roll and extending from one housing to the other and mounted in bearings carried thereby for oscillation and endwise movement in a xed axial line, a holder rigidly attached to each rod, a polishing member mounted in said holder and offset from said rod, mechanism located outside of the housings and connected to said rods for moving the same endwise for moving the polishing members back and forth across the rolls and mechanism located outside of the housings and connected to said rods for yieldingly holding said polishing devices in engagement with said rolls, said rods, holders and polishing members being disposed on the discharge side of the mill and inside a line tangent to the rolls. y

5. A polishing mechanism for the rolls of a hot mill comprising a rod associated with each roll and extending from one housing to the other and mounted in bearings carried thereby for endwise and oscillating movement, a holder rigidly attached to each rod, a polishing member mounted in the holder and oiset from the rod, means acting directly on said rod for yieldingly forcing the polishing member into contact with the roll with which it is associated and means for reciprocating the rods for'movingthe polishing members back and forth over the rolls.

, DELBERT B. GEESEMAN. 

